package com.itheima.security;

import com.alibaba.dubbo.config.annotation.Reference;
import com.itheima.UserService;
import com.itheima.pojo.Permission;
import com.itheima.pojo.Role;
import com.itheima.pojo.User;
import org.springframework.security.core.GrantedAuthority;
import org.springframework.security.core.authority.SimpleGrantedAuthority;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.core.userdetails.UsernameNotFoundException;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
import org.springframework.stereotype.Component;

import java.util.ArrayList;
import java.util.List;
import java.util.Set;

@Component
public class SpringSecurityUserService implements UserDetailsService {

    @Reference
    private UserService userService;

    @Override
    public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException {

        //根据用户名查询用户信息
        User user = userService.findByUserName(username);
        if (user == null){
            return null;
        }

        /*创建权限容器*/
        List<GrantedAuthority> list = new ArrayList<>();

        /*获取该用户的所有角色*/
        Set<Role> roles = user.getRoles();

        /*遍历角色集合*/
        for (Role role : roles) {

            /*获取该角色所拥有的权限集合*/
            Set<Permission> permissions = role.getPermissions();

            /*遍历权限集合*/
            for (Permission permission : permissions) {
                /*将所有权限置入权限管理器中*/
                list.add(new SimpleGrantedAuthority(permission.getKeyword()));
            }
        }

        UserDetails userDetails =
                new org.springframework.security.core.userdetails.User(username,user.getPassword(),list);

        return userDetails;
    }

    public static void main(String[] args) {
        BCryptPasswordEncoder bc = new BCryptPasswordEncoder();
        String encode = bc.encode("1234");
        System.out.println("encode = " + encode);
    }
}
